| When doing a phase vocoding one is really doing a Fourier transform on
a series of sections of the audio. These sections are called windows,
and and usually arranged so as to overlap. The PV file is the
spectral information for a series of these time windows.
I realise that is a simplistic explaination, but..... the larger the
window the faster the PV, but the more smearing there is as it does
not track changes so well. Small windows are slow, and not so
accurate as there is insufficient data to get accurate estimates.
I leave it to teh DSP experts to explain in detail.
==John ff |